72608638 has 8 divisors (see below), whose sum is σ = 108969480. Its totient is φ = 36285480.

The previous prime is 72608629. The next prime is 72608651. The reversal of 72608638 is 83680627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72608638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973 + ... + 12688.

It is an arithmetic number, because the mean of its divisors is an integer number (13621185).

Almost surely, 2^72608638 is an apocalyptic number.

72608638 is a deficient number, since it is larger than the sum of its proper divisors (36360842).

72608638 is a wasteful number, since it uses less digits than its factorization.

72608638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18842.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 72608638 is about 8521.0702379455. The cubic root of 72608638 is about 417.1857158803.

The spelling of 72608638 in words is "seventy-two million, six hundred eight thousand, six hundred thirty-eight".